[PVE-User] SPC-3 PR compliance

Lutz Markus Willek l.willek at science-computing.de
Thu Dec 11 12:54:26 CET 2014


Hi David,

Please check dmesg, messages like "SPC-3 [...] Received res_key: [...] does not match [...]"
uname -a ?

multipath (dm-multipath) is not mandatory, have a look at https://pve.proxmox.com/wiki/ISCSI_Multipath
If you are not using multipath, of course you should trunk (i.e bonding, 802.3ad/lacp) your network to provide multiple paths to the storage. As a rule of thumb, multipath is slightly faster and a bit more reliable, bonding somewhat easier to implement, because neither adjustments nor maintenance of the multipath/lvm configuration files are required. I personally prefer multipath.

Regards Lutz

-----Urspr√ľngliche Nachricht-----
> Von:David Lawley <davel at upilab.com>
> Gesendet: Fre 5 Dezember 2014 21:42
> An: pve-user at pve.proxmox.com
> Betreff: [PVE-User] SPC-3 PR compliance
> 
> My storage SAN is a ScaleComputing cluster.
> 
> It claims to have SPC-3 PR compliant iscsi targets.
> 
> I have 3 targets setup with SPC-3 enabled and connected to the Proxmox 
> cluster.
> 
> using sg_persist -n -i -k -d /dev/sd(x) on each connected iscsi 
> connection from Promox gives the following result
> 
> PR generation=0x0, there are NO registered reservation keys
> 
> Vendor says that multi path is not required when using SPC-3 PR on the 
> san, but I would suppose that also means that the initiator would also 
> need to be compatible?
> 
> So I'm asking if the consensus is muti path is required no matter what 
> on the Proxmox nodes or is SPC-3 really doing it?
> 
> Thanks
> 
> 
> 
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